diff --git a/.changeset/fix-form-onsubmit-type.md b/.changeset/fix-form-onsubmit-type.md
new file mode 100644
index 0000000000..e6d0fc103c
--- /dev/null
+++ b/.changeset/fix-form-onsubmit-type.md
@@ -0,0 +1,5 @@
+---
+"react-router": patch
+---
+
+Remove explicit `onSubmit` type override from `SharedFormProps` to fix deprecation warning with `@types/react@19.x`
diff --git a/contributors.yml b/contributors.yml
index 6a7f04d055..4965c4f925 100644
--- a/contributors.yml
+++ b/contributors.yml
@@ -351,6 +351,7 @@
 - refusado
 - remorses
 - renyu-io
+- restareaByWeezy
 - reyronald
 - RFCreate
 - richardkall
diff --git a/packages/react-router/lib/dom/lib.tsx b/packages/react-router/lib/dom/lib.tsx
index 79b67edf2a..2028a5c5fa 100644
--- a/packages/react-router/lib/dom/lib.tsx
+++ b/packages/react-router/lib/dom/lib.tsx
@@ -1770,13 +1770,6 @@ interface SharedFormProps extends React.FormHTMLAttributes<HTMLFormElement> {
    */
   preventScrollReset?: boolean;
 
-  /**
-   * A function to call when the form is submitted. If you call
-   * [`event.preventDefault()`](https://developer.mozilla.org/en-US/docs/Web/API/Event/preventDefault)
-   * then this form will not do anything.
-   */
-  onSubmit?: React.FormEventHandler<HTMLFormElement>;
-
   /**
    * Specify the default revalidation behavior after this submission
    *